ALL of the Sentek's HD912 series detectors meet the requirements of UL521 and EN54-5 for use in fire alarm signaling systems,which provide fast and reliable response for heat 57 °C(135 °F) or Rate-of Rise detection,They are intended for use in 2-wire/4-wire Class A2 supervised zone circuits.The HD912 series detectors are subjest to panel compatibility limits and compliance with corresponding NFPA72E standards,local codes,and ordinances.

Sentek Electronics Co.,Ltd is specializing in designing,developing and manufacturing fire and security detectors and magnetic contacts from 2001.Take quality as life of corporation ,our products are all designed and manufactured completely according to the standard of EN,UL,KFI and so on .All our products are tested one by one in sensitivity and function features.So we enjoyed a good reputation in the world!